package cn.unknowpupil.init.components.aspect;

import cn.unknowpupil.init.async.AsyncFactory;
import cn.unknowpupil.init.async.AsyncManager;
import cn.unknowpupil.init.components.annotation.Log;
import cn.unknowpupil.init.domain.dto.LoginUser;
import cn.unknowpupil.init.domain.system.SysLogRecord;
import cn.unknowpupil.init.utils.strings.MapperUtils;
import cn.unknowpupil.init.utils.security.SecurityUtils;
import cn.unknowpupil.init.utils.security.ServletUtils;
import cn.unknowpupil.init.utils.strings.StringUtils;
import cn.unknowpupil.init.utils.html.IPUtils;
import eu.bitwalker.useragentutils.UserAgent;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.annotation.Order;
import org.springframework.http.HttpMethod;
import org.springframework.stereotype.Component;
import org.springframework.validation.BeanPropertyBindingResult;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.HandlerMapping;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Date;
import java.util.Map;
import java.util.Objects;


/**
 * Created at 2020/10/16 by w10g <br>
 * Initialize LogAspect ... <br>
 *
 * @author unknowpupil
 * @since 0.0.1
 */
@Aspect
@Component
public class LogAspect {

    @Resource
    private AsyncManager asyncManager;


    ThreadLocal<Long> currentTime = new ThreadLocal<>();

    private static final Logger log = LoggerFactory.getLogger(LogAspect.class);

    @Pointcut("execution(public * cn.unknowpupil.init.controller..*.*(..))")
    @Order(2)
    public void pointCut() {
    }



    /**
     * 配置织入点
     */
    @Pointcut("@annotation(cn.unknowpupil.init.components.annotation.Log)")
    @Order(1) // Order 代表优先级，数字越小优先级越高
    public void logPointCut() {

    }


    @Before(value = "logPointCut() || pointCut()")
    public void before(JoinPoint joinPoint) {
        System.out.println("方法执行前执行......before");
        HttpServletRequest request = ServletUtils.getRequest();
        log.info("<=====================================================");
        log.info("请求来源： =》" + request.getRemoteAddr());
        log.info("请求URL：" + request.getRequestURL().toString());
        log.info("请求方式：" + request.getMethod());
        log.info("响应方法：" + joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName());
        log.info("请求参数：" + Arrays.toString(joinPoint.getArgs()));
        log.info("------------------------------------------------------");
        currentTime.set(System.currentTimeMillis());
    }


    /**
     * 处理完请求后执行
     *
     * @param joinPoint 切点
     */
    @AfterReturning(pointcut = "logPointCut()", returning = "jsonResult")
    public void doAfterReturning(JoinPoint joinPoint, Object jsonResult) {

        handleLog(joinPoint, null, jsonResult);
    }

    /**
     * 拦截异常操作
     *
     * @param joinPoint 切点
     * @param e         异常
     */
    @AfterThrowing(value = "logPointCut()", throwing = "e")
    public void doAfterThrowing(JoinPoint joinPoint, Exception e) {
        handleLog(joinPoint, e, null);
    }

    protected void handleLog(final JoinPoint joinPoint, final Exception e, Object jsonResult) {
        try {
            // 获得注解
            Log controllerLog = getAnnotationLog(joinPoint);
            if (controllerLog == null) {
                return;
            }
            // *========数据库日志=========*//
            SysLogRecord operLog = new SysLogRecord();
            LoginUser loginUser = SecurityUtils.getLoginUser();
            if (!Objects.isNull(loginUser)) {
                operLog.setOperName(loginUser.getUsername());
            }

            if (loginUser != null) {
                operLog.setOperName(loginUser.getUsername());
                operLog.setCreateBy(loginUser.getUsername());
            }

            operLog.setStatus(0 + "");
            operLog.setOperTime(new Date());
            // 请求的地址
            String ip = IPUtils.getIp(ServletUtils.getRequest());

            operLog.setOperIp(ip);
            // 返回参数
            operLog.setJsonResult(MapperUtils.obj2json(jsonResult));

            operLog.setOperUrl(ServletUtils.getRequest().getRequestURI());


            if (e != null) {
                operLog.setStatus(1 + "");
                operLog.setErrorMsg(StringUtils.substring(e.getMessage(), 0, 2000));
            }
            // 设置方法名称
            String className = joinPoint.getTarget().getClass().getName();
            String methodName = joinPoint.getSignature().getName();
            operLog.setMethod(className + "." + methodName + "()");
            // 设置请求方式
            operLog.setRequestMethod(ServletUtils.getRequest().getMethod());
            // 处理设置注解上的参数
            getControllerMethodDescription(joinPoint, controllerLog, operLog);
            UserAgent userAgent = UserAgent.parseUserAgentString(ServletUtils.getRequest().getHeader("User-Agent"));
            operLog.setBrowser(userAgent.getBrowser().getName());
            operLog.setOs(userAgent.getOperatingSystem().getName());
            // 保存数据库
            // 耗时
            operLog.setTimeConsuming(System.currentTimeMillis() - currentTime.get());
            currentTime.remove();
            asyncManager.execute(AsyncFactory.recordOper(operLog));

        } catch (Exception exp) {
            // 记录本地异常日志
            log.error("==前置通知异常==");
            log.error("异常信息:{}", exp.getMessage());
            exp.printStackTrace();
        }
    }

    /**
     * 获取注解中对方法的描述信息 用于Controller层注解
     *
     * @param log     日志
     * @param operLog 操作日志
     * @throws Exception
     */
    public void getControllerMethodDescription(JoinPoint joinPoint, Log log, SysLogRecord operLog) throws Exception {
        // 设置action动作
        operLog.setBusinessType(log.businessType().ordinal());
        // 设置标题
        operLog.setTitle(log.title());
        // 设置操作人类别
        operLog.setOperatorType(log.operatorType().ordinal());
        // 是否需要保存request，参数和值
        if (log.isSaveRequestData()) {
            // 获取参数的信息，传入到数据库中。
            setRequestValue(joinPoint, operLog);
        }
    }

    /**
     * 获取请求的参数，放到log中
     *
     * @param operLog 操作日志
     * @throws Exception 异常
     */
    private void setRequestValue(JoinPoint joinPoint, SysLogRecord operLog) throws Exception {
        String requestMethod = operLog.getRequestMethod();
        if (HttpMethod.PUT.name().equals(requestMethod) || HttpMethod.POST.name().equals(requestMethod)) {
            String params = argsArrayToString(joinPoint.getArgs());
            operLog.setOperParam(StringUtils.substring(params, 0, 2000));
        } else {
            Map<?, ?> paramsMap = (Map<?, ?>) ServletUtils.getRequest().getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
            operLog.setOperParam(StringUtils.substring(paramsMap.toString(), 0, 2000));
        }
    }

    /**
     * 是否存在注解，如果存在就获取
     */
    private Log getAnnotationLog(JoinPoint joinPoint) throws Exception {
        Signature signature = joinPoint.getSignature();
        MethodSignature methodSignature = (MethodSignature) signature;
        Method method = methodSignature.getMethod();

        if (method != null) {
            return method.getAnnotation(Log.class);
        }
        return null;
    }

    /**
     * 参数拼装
     */
    private String argsArrayToString(Object[] paramsArray) {
        String params = "";
        if (paramsArray != null && paramsArray.length > 0) {
            for (int i = 0; i < paramsArray.length; i++) {
                if (!isFilterObject(paramsArray[i])) {
                    Object jsonObj = null;
                    try {
                        jsonObj = MapperUtils.obj2json(paramsArray[i]);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                    params += jsonObj.toString() + " ";
                }
            }
        }
        return params.trim();
    }

    /**
     * 判断是否需要过滤的对象。
     *
     * @param o 对象信息。
     * @return 如果是需要过滤的对象，则返回true；否则返回false。
     */
    public boolean isFilterObject(final Object o) {
        return o instanceof MultipartFile || o instanceof HttpServletRequest || o instanceof HttpServletResponse || o instanceof BeanPropertyBindingResult;
    }
}
